EP0507897B1 - Barbecue fuel in the form of fragments made from cobs of corn compacted without any binder and fragmenting device for producing said fuel - Google Patents

Barbecue fuel in the form of fragments made from cobs of corn compacted without any binder and fragmenting device for producing said fuel Download PDF

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Publication number
EP0507897B1
EP0507897B1 EP19910914940 EP91914940A EP0507897B1 EP 0507897 B1 EP0507897 B1 EP 0507897B1 EP 19910914940 EP19910914940 EP 19910914940 EP 91914940 A EP91914940 A EP 91914940A EP 0507897 B1 EP0507897 B1 EP 0507897B1
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Prior art keywords
fuel
sausage
cobs
corn
fragmentation
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EP19910914940
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German (de)
French (fr)
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EP0507897A1 (en
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Bénédicte Blanche HUMBERT
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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00Solid fuels
    • C10L5/40Solid fuels essentially based on materials of non-mineral origin
    • C10L5/44Solid fuels essentially based on materials of non-mineral origin on vegetable substances
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/10Biofuels, e.g. bio-diesel
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

Definitions

  • the invention relates on the one hand to a new densified combustible product, manufactured by extrusion, from corn cobs and intended for grilling on barbecue, where, by the physico-mechanical properties due to the shape of the broken pieces and to their composition , it replaces advantageously charcoal; on the other hand it relates to the device used, during the fragmentation of the extruded material, to obtain the particle size and maintain the consistency useful for the destination of this new product.
  • the only presses capable of compacting the corn cob in a coherent manner are the worm extruders, delivering a product in the form of a log. These presses did not yet make it possible to obtain a product intended specifically for grilling, that is to say combining useful characteristics, both by their constitution, their shape, cohesion, density and grain size. However, on these characteristics depend the qualities of flammability, combustion speed, radiant power and behavior of embers.
  • the present invention makes it possible to manufacture from corn cobs a densified product provided with such characteristics, that is to say a fuel suitable for barbecue grilling.
  • the corn cob is densified by a single screw extruder capable of compacting this material in the form of a rod of specific density greater than 1000 kg / cubic meter and leaving a continuous hole in the center of this rod.
  • the original function of the central hole is the evacuation of the extrusion gases.
  • This device is characterized in that the tube leaves the die to cool in the open air in a channel over a distance adjustable from 20 to 60 cm then engage in a guide tube at the end of which it impaled on a pike in the shape of a tapered cone.
  • This particle size is decisive and optimal in terms of the combustion behavior of the densified corn cob for grilling; on the other hand the fragmentation does not decrease the cohesion of the broken pieces which harden, in fact, by cooling after cutting; it increases the specific surface of the pieces and produces a surface condition of the cuts such that the flammability is improved and that the combustion speed is optimal for grilling.
  • the advantages obtained thanks to this device consist essentially - in that it allows the obtaining of a densified fuel without binder from corn cobs, in the form of broken rice whose characteristics advantageously make it suitable for grilling; - in that the energy of fragmentation is taken from the pushing force of the press, therefore does not require expensive electro-mechanical installation; - in that the fragmentation gives the product a grain size and shape which facilitate the flammability of the product; - in that the cohesion of the product is not affected by the fragmentation, due to the possibility of adjusting the cooling time according to the desired quality as a function of the temperature and humidity of the rod and the possibility of choosing the optimal hardness for fragmentation by adjusting the distance between the guide tube and the spike; - in that the wear part of the tool is a steel cone easily rechargeable with the abrasion-resistant electrode.
  • the advantages characterizing this new product consist in that the breakage is a new fuel which brings together a set of qualities marking advantages with respect to current fuels for grilling: - calorific value 3800 kcal / kg at 7% water content; - equilibrium humidity level at 7% in a conditioned atmosphere at 20 ° C / 65% RH; - cleanliness ; - easy flammability; - the burning of embers gives off a concentration of carbon monoxide that is twice less than the standardized products currently on the market; - combustion speed suitable for grilling; - ecological: environmentally friendly manufacturing and use.
  • Figure 1 shows the device in side view and from above; figure 2 shows the device in perspective.
  • the device comprises a channel (1) followed by a guide tube (2) for holding the rod (8: flow direction) and a stirrup (3) serving to support a sliding spike (4) held in position by pressure screws (5).
  • the device is fixed on a support (6) sliding on a table (7) or built with an adjustable stroke relative to the outlet of the extrusion die.
  • the spike (4) slides in the plane of the axis of the guide tube (2) with a possibility of stroke adjustment relative to the outlet of the guide tube.
  • the stirrup is positioned in a horizontal plane and dimensioned in such a way that the breaks do not remain trapped.
  • Cohesion compressive strength: 10 to 20 daN / cm2

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

A novel barbecue fuel in the form of fragments is produced by grinding and compacting cobs of corn without any binder. It behaves in a certain manner during combustion, as defined by the particle size of the pieces and the composition of the extruded cobs of corn, resulting in features which make it suitable for use with barbecues. A device for fragmenting hollow rolls of compacted ligno-cellulosic substances produces fragments for a novel barbecue fuel having specific physical/mechanical properties. The rolls are shattered under the effect of pressure exerted by a press by means of a sliding tapered pike (4) in a yoke (3) with adjustable spacing in relation to a guide tube (2) for securing the roll which is fed to the tube via a channel (1). The entire device is mounted on a sliding table such that it is possible to adjust the distance between the die outlet and the fragmenting device.

Description

L'invention concerne d'une part un nouveau produit combustible densifié, fabriqué par extrusion, à partir de rafles de maïs et destiné à la grillade sur barbecue, où, par les propriétés physico - mécaniques dues à la forme des brisures et à leur composition, il se substitue avantageusement au charbon de bois ; d'autre part elle a pour objet le dispositif utilisé, lors de la fragmentation de la matière extrudée, pour obtenir la granulométrie et maintenir la cohérence utiles à la destination de ce nouveau produit.The invention relates on the one hand to a new densified combustible product, manufactured by extrusion, from corn cobs and intended for grilling on barbecue, where, by the physico-mechanical properties due to the shape of the broken pieces and to their composition , it replaces advantageously charcoal; on the other hand it relates to the device used, during the fragmentation of the extruded material, to obtain the particle size and maintain the consistency useful for the destination of this new product.

Les différents procédés existant pour la fabrication de combustibles reconstitués par compactage ou extrusion à partir de déchets végétaux ou sous produits agro - industriels, façonnent leurs produits sous forme de bûches ou de granulés, d'aspect lisse, monobloc, souvent cylindriques. Ces produits, destinés initialement à la combustion en foyer sont parfois utilisés par quelques consommateurs comme substitut au charbon de bois mais ils ne réunissent pas les qualités attendues tant par leur composition que par leur forme : selon leurs dimensions, ils doivent pour cet usage être concassés ; l'inflammabilité est mauvaise, la vitesse de combustion est inadaptée à la grillade, trop faible pour les bûches, trop importante pour les granulés, le pouvoir rayonnant et la tenue des braises sont moins performants que ceux des brisures revendiquées. Les seules presses capables de compacter la rafle de maïs de façon cohérente sont les extrudeuses à vis sans fin, délivrant un produit sous forme de bûche. Ces presses ne permettaient pas encore d'obtenir un produit destiné spécifiquement à la grillade, c'est à dire réunissant les caractéristiques utiles, à la fois par leur constitution, leur forme, cohésion, densité et granulométrie. Or, de ces caractéristiques dépendent les qualités d'inflammabilité, de vitesse de combustion, de pouvoir rayonnant et tenue des braises.The various existing processes for the manufacture of fuels reconstituted by compacting or extrusion from vegetable waste or by agro-industrial products, shape their products in the form of logs or granules, of smooth appearance, monobloc, often cylindrical. These products, initially intended for combustion in the hearth, are sometimes used by some consumers as a substitute for charcoal but they do not meet the expected qualities as much by their composition as by their shape: according to their dimensions, they must be crushed for this use. ; the flammability is poor, the combustion speed is unsuitable for grilling, too low for the logs, too high for the pellets, the radiant power and the embers' performance are less efficient than those of the breakages claimed. The only presses capable of compacting the corn cob in a coherent manner are the worm extruders, delivering a product in the form of a log. These presses did not yet make it possible to obtain a product intended specifically for grilling, that is to say combining useful characteristics, both by their constitution, their shape, cohesion, density and grain size. However, on these characteristics depend the qualities of flammability, combustion speed, radiant power and behavior of embers.

La présente invention permet de fabriquer à partir de rafles de maïs un produit densifié pourvu de telles caractéristiques, c'est à dire un combustible approprié à la grillade sur barbecue. La rafle de maïs est densifiée par une extrudeuse monovis apte à compacter cette matière sous forme d'un boudin de densité spécifique supérieure à 1000 kg/mètre cube et ménageant un trou continu au centre de ce boudin. La fonction d'origine du trou central est l'évacuation des gaz d'extrusion.Ce dispositif est caractérisé en ce que le boudin quitte la filière pour refroidir à l'air libre dans un chenal sur une distance réglable de 20 à 60 cm puis s'engager dans un tube guide au bout duquel elle s'empale sur une pique en forme de cône effilé. Le boudin éclate, sur la portion de matière comprise entre la pique et le tube guide, sous l'effet de la poussée de la vis d'extrusion, en morceaux cohérents de 2 à 7 cm de largeur et longueur et 2 à 3 cm d'épaisseur. Cette granulométrie se révèle décisive et optimale au niveau du comportement en combustion de la rafle de maïs densifiée pour la grillade; d'autre part la fragmentation ne diminue pas la cohésion des brisures qui durcissent, en fait, en refroidissant après découpe ; elle augmente la surface spécifique des morceaux et produit un état de surface des coupes tel que l'inflammabilité est améliorée et que la vitesse de combustion est optimale pour la grillade.The present invention makes it possible to manufacture from corn cobs a densified product provided with such characteristics, that is to say a fuel suitable for barbecue grilling. The corn cob is densified by a single screw extruder capable of compacting this material in the form of a rod of specific density greater than 1000 kg / cubic meter and leaving a continuous hole in the center of this rod. The original function of the central hole is the evacuation of the extrusion gases. This device is characterized in that the tube leaves the die to cool in the open air in a channel over a distance adjustable from 20 to 60 cm then engage in a guide tube at the end of which it impaled on a pike in the shape of a tapered cone. The rod bursts, on the portion of material between the spike and the guide tube, under the effect of the thrust of the extrusion screw, into coherent pieces of 2 to 7 cm in width and length and 2 to 3 cm d 'thickness. This particle size is decisive and optimal in terms of the combustion behavior of the densified corn cob for grilling; on the other hand the fragmentation does not decrease the cohesion of the broken pieces which harden, in fact, by cooling after cutting; it increases the specific surface of the pieces and produces a surface condition of the cuts such that the flammability is improved and that the combustion speed is optimal for grilling.

Les avantages obtenus grâce à ce dispositif consistent essentiellement - en ce qu'il autorise l'obtention d'un combustible densifié sans liant à partir de rafles de maïs, sous forme de brisures dont les caractéristiques le rendent avantageusement approprié à la grillade ; - en ce que l'énergie de fragmentation est prélevée sur l'effort de poussée de la presse, donc ne nécessite pas d'installation électro - mécanique coûteuse ; - en ce que la fragmentation confère au produit une granulométrie et forme qui facilitent l'inflammabilité du produit ; - en ce que la cohésion du produit n'est pas affectée par la fragmentation, en raison de la possibilité de réglage de la durée de refroidissement suivant la qualité désirée en fonction de la température et humidité du boudin et de la possibilité de choix de la dureté optimale pour la fragmentation par le réglage de la distance entre le tube guide et la pique ; - en ce que la pièce d'usure de l'outil est un cône en acier rechargeable aisément à l'électrode résistante à l'abrasion.The advantages obtained thanks to this device consist essentially - in that it allows the obtaining of a densified fuel without binder from corn cobs, in the form of broken rice whose characteristics advantageously make it suitable for grilling; - in that the energy of fragmentation is taken from the pushing force of the press, therefore does not require expensive electro-mechanical installation; - in that the fragmentation gives the product a grain size and shape which facilitate the flammability of the product; - in that the cohesion of the product is not affected by the fragmentation, due to the possibility of adjusting the cooling time according to the desired quality as a function of the temperature and humidity of the rod and the possibility of choosing the optimal hardness for fragmentation by adjusting the distance between the guide tube and the spike; - in that the wear part of the tool is a steel cone easily rechargeable with the abrasion-resistant electrode.

Les avantages caractérisant ce nouveau produit consistent en ce que la brisure est un nouveau combustible qui réunit un ensemble de qualités marquant des avantages vis à vis des combustibles actuels pour grillade: - pouvoir calorifique 3800 kcal/kg à 7% de teneur en eau ;
- taux d'humidité d'équilibre à 7% en atmosphère conditionnée à 20°C/65% HR ; - propreté ; - inflammabilité aisée ; - la combustion des braises dégage une concentration en monoxyde de carbone deux fois moindre que les produits normalisés actuellement sur le marché ; - vitesse de combustion adaptée à la grillade ; - écologique : fabrication et utilisation non polluante pour l'environnement.
The advantages characterizing this new product consist in that the breakage is a new fuel which brings together a set of qualities marking advantages with respect to current fuels for grilling: - calorific value 3800 kcal / kg at 7% water content;
- equilibrium humidity level at 7% in a conditioned atmosphere at 20 ° C / 65% RH; - cleanliness ; - easy flammability; - the burning of embers gives off a concentration of carbon monoxide that is twice less than the standardized products currently on the market; - combustion speed suitable for grilling; - ecological: environmentally friendly manufacturing and use.

Le principe de l'invention est exposé ci-après à l'aide de dessins représentant un mode d'exécution du dispositif de fragmentation ; ensuite les caractéristiques du produit sont étayées par des résultats d'analyses en laboratoire. La figure 1 présente le dispositif en vue de côté et du dessus ; la figure 2 montre le dispositif en perspective. Le dispositif comporte un chenal (1) suivi d'un tube guide (2) de maintien du boudin (8 : sens d'écoulement) et d'un étrier (3) servant de support à une pique (4) coulissante maintenue en position par des vis de pression (5). Le dispositif est fixé sur un support (6) coulissant sur une table (7) ou bâti avec une course réglable par rapport à la sortie de la filière d'extrusion. La pique (4) coulisse dans le plan de l'axe du tube guide (2) avec une possibilité de réglage de course par rapport à la sortie du tube guide. L'étrier est positionné dans un plan horizontal et dimensionné de telle manière que les brisures ne restent pas coincées.The principle of the invention is set out below with the aid of drawings representing an embodiment of the fragmentation device; then the product characteristics are supported by laboratory analysis results. Figure 1 shows the device in side view and from above; figure 2 shows the device in perspective. The device comprises a channel (1) followed by a guide tube (2) for holding the rod (8: flow direction) and a stirrup (3) serving to support a sliding spike (4) held in position by pressure screws (5). The device is fixed on a support (6) sliding on a table (7) or built with an adjustable stroke relative to the outlet of the extrusion die. The spike (4) slides in the plane of the axis of the guide tube (2) with a possibility of stroke adjustment relative to the outlet of the guide tube. The stirrup is positioned in a horizontal plane and dimensioned in such a way that the breaks do not remain trapped.

Résultats d'analyses en laboratoire des brisures de rafle de maïsResults of laboratory analyzes of broken corn cob

Pouvoir calorifique : 3800 kcal/kg à 7% humidité.Calorific value: 3800 kcal / kg at 7% humidity.

Cohésion : résistance à la compression:10 à 20 daN/cm²Cohesion: compressive strength: 10 to 20 daN / cm²

Masse volumique : 500 à 600 kg/m³ en vrac

Figure imgb0001
Density: 500 to 600 kg / m³ in bulk
Figure imgb0001

Claims (3)

  1. Fuel for grilling, characterized by its form in flakes and by its composition of ground maize cobs compacted by extrusion and then fragmented, with a grain size distribution such that the main fraction passes through a sieve with a 7 x 7 cm mesh without passing through a sieve of 2 x 2 cm, and with a bulk volumetric mass of 500 to 600 Kg/m³, and a cohesion represented by a compression breaking strength of 10 to 20 daN/cm².
  2. Process of manufacture of the fuel according to Claim 1, characterized by the fact that it includes the following stages:
    a) Compacting, into the form of a sausage with a continuous central hole, of maize cobs or vegetal waste or agro-industrial by-products, by a worm screw extruder.
    b) Fragmentation of the sausage thus obtained, having a specific density of more than 1000 Kg/m3, by bursting and flaking after presentation of the extruded hollow sausage coming from the die-plate to an adjustable fragmentation device.
  3. Adjustable device for the fragmentation of the hollow sausage of fuel in densified ligno-cellulosic material for the implementation of Stage (b) of the manufacturing process according to Claim 2, characterized by the fact that it consists of a sharpened spike (4), sliding in a yoke (3) adjustable in its distance in relation to a sausage holding guide tube (2), the sausage being presented to the said tube by a runner (1). The entire device is mounted on a sliding table (7) or on any sliding system such that it is possible to adjust the distance between the exit of the extruded sausage and the device.
EP19910914940 1990-08-20 1991-08-20 Barbecue fuel in the form of fragments made from cobs of corn compacted without any binder and fragmenting device for producing said fuel Expired - Lifetime EP0507897B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91914940T ATE103320T1 (en) 1990-08-20 1991-08-20 FUEL FOR GRILLING CONSISTING OF COMPRESSED CORN COBLES WITHOUT BINDING AGENTS AND CRUSHING DEVICE FOR ITS PRODUCTION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9010699 1990-08-20
FR9010699A FR2665906B1 (en) 1990-08-20 1990-08-20 COMBUSTIBLE BREAK FOR GRILL, CONSISTING OF GRINDED MURAL RAFLES DENSIFIED WITHOUT BINDER AND FRAGMENTATION DEVICE NECESSARY FOR THE MANUFACTURE OF THIS PRODUCT.

Publications (2)

Publication Number Publication Date
EP0507897A1 EP0507897A1 (en) 1992-10-14
EP0507897B1 true EP0507897B1 (en) 1994-03-23

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EP19910914940 Expired - Lifetime EP0507897B1 (en) 1990-08-20 1991-08-20 Barbecue fuel in the form of fragments made from cobs of corn compacted without any binder and fragmenting device for producing said fuel

Country Status (5)

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EP (1) EP0507897B1 (en)
DE (1) DE69101484T2 (en)
ES (1) ES2055615T3 (en)
FR (1) FR2665906B1 (en)
WO (1) WO1992003523A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006122405A1 (en) * 2005-05-16 2006-11-23 Evergreen Biofuels Inc. Agricultural fibre fuel pellets

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19606400A1 (en) * 1996-02-21 1997-08-28 Amft Karl Heinrich Fuel for grills
ES2128259B1 (en) * 1997-05-05 2000-04-01 Univ Alicante ALMOND CASCARA FUEL BRIQUETTES.
US9481854B2 (en) 2008-02-21 2016-11-01 S. C. Johnson & Son, Inc. Cleaning composition that provides residual benefits

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR981299A (en) * 1943-04-01 1951-05-24 Machine for vacuum molding of combustible agglomerates
US4326854A (en) * 1979-03-09 1982-04-27 Tanner John D Synthetic firelog
FR2642434A1 (en) * 1989-01-31 1990-08-03 Humbert Benedicte Reconstituted log

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006122405A1 (en) * 2005-05-16 2006-11-23 Evergreen Biofuels Inc. Agricultural fibre fuel pellets

Also Published As

Publication number Publication date
FR2665906A1 (en) 1992-02-21
DE69101484D1 (en) 1994-04-28
WO1992003523A1 (en) 1992-03-05
EP0507897A1 (en) 1992-10-14
DE69101484T2 (en) 1994-11-03
FR2665906B1 (en) 1992-11-27
ES2055615T3 (en) 1994-08-16

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